Note 13 - Accumulated Other Comprehensive Income (Details) - Accumulated Balances of Other Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of January 1, 2014	$ 6,196	$ 6,020	$ 6,616		$ 6,616
Balance as of January 1, 2014	5,840	5,652	6,260		6,260
Foreign Currency Translation Adjustments	6,098	6,196	6,020		6,098
Total	5,661	5,840	5,652		5,661
Foreign Currency Translation Adjustments	(98)	176	(596)
Total	(179)	189	(608)
Unrealized Gain (Loss) on Available-for-Sale Securities		(1)
Total		(1)
Unrealized Gain (Loss) on Available-for-Sale Securities					(65)
Foreign Currency Translation Adjustments	(98)	176	(596)
Total	(179)	188	(608)	614	(599)	1,724
Available-for-sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of January 1, 2014	16	9	4		4
Unrealized Gain (Loss) on Securities	(12)	16	9		(12)
Unrealized Gain (Loss) on Available-for-Sale Securities	(28)	8	5
Unrealized Gain (Loss) on Available-for-Sale Securities		(1)
Total		(1)
Unrealized Gain (Loss) on Available-for-Sale Securities	(28)	7	5
Auction Rate Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of January 1, 2014	(372)	(377)	(360)		(360)
Unrealized Gain (Loss) on Securities	(425)	(372)	(377)		(425)
Unrealized Gain (Loss) on Available-for-Sale Securities	(53)	5	(17)
Unrealized Gain (Loss) on Available-for-Sale Securities	$ (53)	$ 5	$ (17)	$ 149	$ (65)	$ 117